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circuit simplification help needed

 
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mark.supinski(at)gmail.co
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PostPosted: Mon Jan 16, 2006 5:25 pm    Post subject: circuit simplification help needed Reply with quote

Hello all-

I'd like to 'simplify' the circuit shown in the following image:

http://supinski.net:8080/injectors.jpg

As you can see in the image, the circuit calls for 2 DPST switches. What
I'd like to do, is implement this using only a single switch such that it
ends up being (Primary only) - (Both) - (Secondary Only).

Can anyone tell me how to do this? Note that when in either the (Primary
only) position or the (Secondary Only) position, the cold-start terminal
must be grounded.

I think this can be accomplished using the 4TL1-10 microswitch Bob calls out
in the wigwag article. However this part is now horrendously expensive
($69) and tough to find -- I am reluctant to buy it since I don't know if it
can fit in the same spot as on of the more common switches found in AEC.
Obviously a solution using a more "common" switch from B and C would be
preferred...

Thanks very much for any help!

Mark Supinski


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ric52md(at)yahoo.com
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PostPosted: Mon Jan 16, 2006 8:24 pm    Post subject: circuit simplification help needed Reply with quote

It seems to me that you could use a 2 pole 3 position
rotary switch to do this. The attached file is a
terrible drawing, but it's the best I could do at
home. I found some switches made by ITT, C&K M series
that are 6 amps continous, 28 VDC. Hope this helps,
been out of doing this for a while. Loose the design
edge quick when only doing tech support. You have my
disclaimer... I'm not a builder or a pilot. I hope to
start lessons in the spring and build in the fall.

Ric
--- "Mark R. Supinski" <mark.supinski(at)gmail.com>
wrote:

Quote:

Supinski" <mark.supinski(at)gmail.com>

Hello all-

I'd like to 'simplify' the circuit shown in the
following image:

http://supinski.net:8080/injectors.jpg



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bobsv35b(at)aol.com
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PostPosted: Tue Jan 17, 2006 9:03 am    Post subject: circuit simplification help needed Reply with quote

Good Morning Ric,

Welcome aboard!

Stick with it and keep us advised as to how things are going. Just remember that flying is fun. If your first instructor does not make it fun, shop around until you find one that does. Getting good flight instruction is not easy these days, but it can be done!

Enjoy.

Happy Skies,

Old Bob
AKA
Bob Siegfried
Ancient Aviator
Stearman N3977A
Downers Grove, Illinois
630 985-8502

--


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